China Clay

Zigma offers several grades of China Clay. The crude kaolin is processed to remove grit and other impurities. Various proprietary chemical processes are also used to purify the clay further. The washing and removal of impurities enhances the whiteness of kaolin which makes it very valuable for the ceramic industry. Washed kaolin lumps can further be processed for applications in rubber and agrochemical.

Ceramic Grades

China clay/kaolin is a hydrous alumina silicate that is used in bodies of tiles, engobe, and glaze. Kaolin enhances working and drying properties of ceramic bodies. It can provide whiteness to engobe upto L* 95 and acts a suspending agent in glaze slips. Zigma offers low plasticity kaolins from Kutch region with L* values upto 94-94.5 in lump, noodle, and powder form.

Coating Grades (Paints & Paper)

Zigma offers three grades of kaolin for the paper industry. Controlling particle size and removal of impurities increases the brightness of kaolin. High brightness kaolin clays can be used in paints and paper industries. Kaolin can also be processed into slurry form for direct use in paints and paper.
These clays are available as lumps, powder, and slurries.

Specification

% Particle <2µm

ISO Brightness

% Residue 325 mesh

Opax

55

84

<0.3

Opacent

83

84

<0.1

Opagloss

90

87

<0.1

Zigma International is the only producer of Kaolin slurries in India at 65% solids. All three grades are available as stable slurries.

Rubber Kaolin

Zigma offers washed kaolin powders with minimal grit content and for the rubber industry. The rubber kaolin can be processed to a variety of particle sizes, colour, and grit content as desired by the customer.

Agrochemical Kaolin

Kaolin with different particle sizes, densities, and pH can be used for sprayable and granulated pesticide/herbicide formulations. These kaolin clays offer high reflectance, sprayability, and stability to agricultural applications.